Introduce NodeTraversal::ancestorsOf() and inclusiveAncestors() for range-based for loop

third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
index e9102811b6d94faf676e4c0960f77cea5c87d237..611202411a2df3104977b5e18f3d4195b88eb355 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXLayoutObject.cpp
@@ -1707,9 +1707,11 @@ Element* AXLayoutObject::anchorElement() const
     // search up the DOM tree for an anchor element
     // NOTE: this assumes that any non-image with an anchor is an HTMLAnchorElement
     Node* node = currLayoutObject->node();
-    for ( ; node; node = node->parentNode()) {
-        if (isHTMLAnchorElement(*node) || (node->layoutObject() && cache.getOrCreate(node->layoutObject())->isAnchor()))
-            return toElement(node);
+    if (!node)
+        return nullptr;
+    for (Node& runner : NodeTraversal::inclusiveAncestorsOf(*node)) {
+        if (isHTMLAnchorElement(runner) || (runner.layoutObject() && cache.getOrCreate(runner.layoutObject())->isAnchor()))
+            return toElement(&runner);
     }
 
     return 0;